90 lines
3.9 KiB
C++
90 lines
3.9 KiB
C++
/*
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* Copyright 2015-2020 Michele "King_DuckZ" Santullo
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include "vectorwrapper/vectorwrapper.hpp"
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#include "vectorwrapper/size_type.hpp"
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#include <type_traits>
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#include <cstddef>
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#if defined VWR_OUTER_NAMESPACE
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namespace VWR_OUTER_NAMESPACE {
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#endif
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namespace vwr {
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template <typename V1, typename V2, size_type S>
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typename std::common_type<typename Vec<V1>::scalar_type, typename Vec<V2>::scalar_type>::type dot ( const Vec<V1, S>& parLeft, const Vec<V2, S>& parRight );
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template <typename V1, typename V2>
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typename std::common_type<typename Vec<V1>::scalar_type, typename Vec<V2>::scalar_type>::type cross ( const Vec<V1, 2>& parLeft, const Vec<V2, 2>& parRight );
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template <typename V1, typename V2>
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Vec<typename std::common_type<V1, V2>::type> cross ( const Vec<V1, 3>& parLeft, const Vec<V2, 3>& parRight );
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template <typename V1, typename V2, size_type S>
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Vec<typename std::common_type<V1, V2>::type> min ( const Vec<V1, S>& parLeft, const Vec<V2, S>& parRight );
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template <typename V1, typename V2, size_type S>
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Vec<typename std::common_type<V1, V2>::type> max ( const Vec<V1, S>& parLeft, const Vec<V2, S>& parRight );
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namespace implem {
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template <typename V1, typename V2, size_type S, size_type... Indices>
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inline Vec<typename std::common_type<V1, V2>::type> min ( bt::number_seq<size_type, Indices...>, const Vec<V1, S>& parLeft, const Vec<V2, S>& parRight ) {
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return {parLeft[Indices] < parRight[Indices] ? parLeft[Indices] : parRight[Indices]...};
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}
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template <typename V1, typename V2, size_type S, size_type... Indices>
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inline Vec<typename std::common_type<V1, V2>::type> max ( bt::number_seq<size_type, Indices...>, const Vec<V1, S>& parLeft, const Vec<V2, S>& parRight ) {
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return {parLeft[Indices] < parRight[Indices] ? parRight[Indices] : parLeft[Indices]...};
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}
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} //namespace implem
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template <typename V1, typename V2, size_type S>
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inline typename std::common_type<typename Vec<V1>::scalar_type, typename Vec<V2>::scalar_type>::type dot (const Vec<V1, S>& parLeft, const Vec<V2, S>& parRight) {
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auto retval = parLeft.x() * parRight.x();
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for (size_type z = 1; z < S; ++z) {
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retval += parLeft[z] * parRight[z];
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}
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return retval;
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}
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template <typename V1, typename V2>
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inline typename std::common_type<typename Vec<V1>::scalar_type, typename Vec<V2>::scalar_type>::type cross (const Vec<V1, 2>& parLeft, const Vec<V2, 2>& parRight) {
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return parLeft.x() * parRight.y() - parLeft.y() * parRight.x();
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}
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template <typename V1, typename V2>
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inline Vec<typename std::common_type<V1, V2>::type> cross (const Vec<V1, 3>& parLeft, const Vec<V2, 3>& parRight) {
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return Vec<typename std::common_type<V1, V2>::type>(
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parLeft.y() * parRight.z() - parLeft.z() * parRight.y(),
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parLeft.z() * parRight.x() - parLeft.x() * parRight.z(),
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parLeft.x() * parRight.y() - parLeft.y() * parRight.x()
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);
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}
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template <typename V1, typename V2, size_type S>
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inline Vec<typename std::common_type<V1, V2>::type> min ( const Vec<V1, S>& parLeft, const Vec<V2, S>& parRight ) {
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return implem::min(bt::number_range<size_type, 0, S>(), parLeft, parRight);
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}
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template <typename V1, typename V2, size_type S>
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inline Vec<typename std::common_type<V1, V2>::type> max ( const Vec<V1, S>& parLeft, const Vec<V2, S>& parRight ) {
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return implem::max(bt::number_range<size_type, 0, S>(), parLeft, parRight);
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}
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} //namespace vwr
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#if defined VWR_OUTER_NAMESPACE
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} //namespace VWR_OUTER_NAMESPACE
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#endif
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